This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-cakephp-13.0-wheezy-i386-xen.tar.bz2.sig gpg: Signature made Fri Nov 1 08:49:52 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f9684a57d8d4a80bec3dd4432a9c2ea1b89f02e5 * md5sum 9abf7689da177876506e8b551d90bb99 You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSc2soAAoJEIXCXpWhbrlN//0IALEiNCdLj85j1/N9d0CDE8LK yvQoxuX3rw5AzgV9rc0tXQ2GrFCPQlvinXMyo8NEmChDGllKSb528p1pUZurZqZ+ g2+4RNWZFIqEH4g8OSknm36l92H3lr7BjGX7VsmziuqwhoCfz6Y39RyJWSqEWkM1 2cKAXkhrJJyg9a0pfo0rc4TRCO8ja9RwPDbBpKvqvT30Bsc79Oc6iQBcfn9hvSRq 5DwV8iRxCdONP551kt086wwG/xOJR/n3i+ssFlQQnBCswXJ9WCib9Pz7ZUCXxSu2 D3d9jHdiOQZelyC6Y39RDYERaTIOaWglmErqedNP6EIEtZiV2TVtto4EA+be+mY= =p3C0 -----END PGP SIGNATURE-----